We have covered couple of Open Source games lists such as 30 Open Source games and Building Simulation games etc. In this post we will cover an complete list of highly addictive FREE 3d Shooter Games. This is the first post in the series and all the games listed here are free and downloadable. Enjoy! Do remember to come back and look for Part 2!
QuakeWorld
QuakeWorld is an Internet multi-player specific version of Quake. ID Software created this version of Quake for a better internet experience and playing death match games over internet. Highly recommended.
Download QuakeWorld client here.
Postal 2 Share The Pain Multiplayer (Full Game)
Postal has been a very successful and one of the most controversial games so far. How about playing it for free? The Postal 2 – Share the Pain is available free and a chance to get addicted. High violence is assured!
Download it here.
BZFlag
BZFlag (Battle Zone Capture Flag) is an addictive Tank Game. Download it here.
American Army 3 – Deploy Client
Built on Unreal Engine 3, AA3 delivers stunningly realistic environments, lighting effects, animations, and team-based experiences so that America´s Army players can experience how Soldiers train, live, and advance in the Army. Players are bound by Rules of Engagement (ROE) and gain experience as they navigate challenges in team-based, multiplayer, force-on-force operations.
Check it out here.
World Of Padman
World of Padman is a free multiplayer fps shooter set in a giant real environment e.g the kitchen, the prison etc. There are many characters to choose from with a vary of weapons too. Its very face paced and the maps are beautiful. furthermore its free so give it a try. The World of Padman features full bot support for all game types! All you off-line gamers out there will be happy to play Spray your Color, Big Balloon and Last Pad Standing with bots. The bots play very well, and most maps have been optimized for good bot play. It is pure fun to see the blue nosed people frag each other in SyC and BB.
Check it out here.
Inside The Beast
Inside The Beast is a 3D First Person Shooter (FPS) game. You must go Inside The Beast and fight through his minions before he can unleash his evil on the world. You must succeed where your two best friends failed. When they failed, the Beast buried their hearts in concrete markers. Destroy their markers and retrieve their hearts to give yourself more lives. That will be your only assistance while you fight ghosts, skeletons, zombies, mad axmen, mutants, and more. Don’t become the Beast’s next victim!
Download it here.
Wolfensteine Enemy Territory
Wolfenstein Enemy Territory is a free, stand alone, downloadable multiplayer game in which players wage war as Axis or Allies in team-based combat.
Do battle in traditional single scenarios, or wage war through a series of linked scenarios in a totally new campaign mode. During combat players gain experience and skill, and through battlefield promotions are awarded additional abilities that remain persistent across an entire campaign.
Download it here.
Nexuiz
Nexuiz is a 3d FPS death match game project, created online by a team of developers called Alientrap. Nexuiz is based on the Darkplaces engine. The darkplaces engine is an advanced Quake1 engine developed mainly by Forest "LordHavoc" Hale, who has been working with the Quake1 engine for many years. Nexuiz is a free open-source first person shooter that runs on Windows, Linux and OSX.
Download it here.
Cellfactor Revolution Free
CellFactor Psychokinetic Wars is a fast-paced first-person multiplayer shooter where you choose your side in the battle of technology vs. humanity. Manipulate your environment and kill your enemies with your choice of gunfire and/or telekinetic superpowers. Use your mind to rip objects from the environment and smash them in any direction or use your powers to create a bullet-proof energy shield. Flying, teleporting and accelerated speed give you countless ways to kill or be killed. Take on the three single-player challenge modes (one mode for each character) or battle live enemies throughout the world in one of four multiplayer modes.
Download from here.
Rising Eagle
Rising Eagle: Futuristic Infantry Warfare is a Free multiplayer, team based, tactical first person shooter. The game is set in the near future, circa 2040, in a world where the USA faces new contenders for superpower status.
Download it from here.
Warsow 0.5
Set in a futuristic cartoon-like world where rocketlauncher-wielding pigs and lasergun-carrying cyberpunks roam the streets, Warsow is a completely free fast-paced first-person shooter (FPS) for Windows, Linux and Mac OS X.
Speed and movement, that’s what Warsow is all about. Like a true cyberathlete you jump, dash, dodge and walljump your way through the game. Grab those power-ups before your enemy does, plant the bomb before anyone sees you, and steal the enemy’s flag before anyone knows what’s going on!
Download it here.
F.E.A.R. COMBAT
F.E.A.R. Combat is a free multiplayer component from the original PC first-person shooter F.E.A.R., which lets you play against the owners of the retail version of F.E.A.R. as well as the other F.E.A.R. Combat users. F.E.A.R. is one of the most critically acclaimed PC shooters of all time. Go ahead and download it here.
there are more than a handful of neat 3D shooter games are available as Free and Open Source. But, Cube 2 - Sauerbraten is the one that stands out prominently. We would call it the most insane and graphic rich 3D Shooter game that you would ever see! Breathtaking sceneries are a treat to your eyes. Of course it is based on the earlier 
